Method I Since 102 is common in both sides, you can factorize it out and simplify (46×102)+(102×54)=102(46+54) 46+54=100 102(46+54)=102(100)=102×100 When multiplying by a number with zeros at the end, multiply the non-zero numbers and join the zeros at the end to the result obtained. 102×100=102×1 and result joined by two zeros 102×100=10200=10,200 Method II Multiply each in the bracket and add the result in the brackets. 46×102=4,692 102×54=5,508 (46×102)+(102×54)=4,692+5,508=10,200